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THE USE OF WASTE AND LOW-GRADE MATERIALS IN ROAD CONSTRUCTION: 3. PULVERISED FUEL ASH

The use of lower-grade and waste materials as alternatives to naturally occurring aggregates in the construction of roads helps to conserve the supplies of good-quality aggregates and assists in problems arising from the disposal of unwanted materials. Much research has been done in the use of various materials that are available but this information is scattered among a large number of publications and is not always readily available. This report is one of a series that is aimed at bringing together together the information on each of the major waste products. It deals with pulverised fuel ash (pfa) and it considers the extent to which pfa can be used in road construction. It discusses the types and quantities of pfa that are available, the purposes to which pfa can be put in the various stages of road construction and the tests needed to ensure that the material meets the required specifications. /TRRL/